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Finding the Fourth Proportional to 64,836.70, 89,385.86 and 40,951.42

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Solution

The fourth proportional to 64,836.70, 89,385.86 and 40,951.42 is: 56,456.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,836.70 : 89,385.86 = 40,951.42 : x
  2. Step 2: Convert to fraction form
    64,836.70/89,385.86 = 40,951.42/x
  3. Step 3: Cross multiply
    64,836.70x = 89,385.86 × 40,951.42
  4. Step 4: Simplify right side
    64,836.70x = 3,660,477,894.92
  5. Step 5: Solve for x
    x = 3,660,477,894.92/64,836.70
  6. Step 6: Final answer
    x = 56,456.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.